Can end seaming mechanism



Oct. 29, 1946;

J. BRENZINGER CAN- END SEAMING MECHANISM Filed Oct. 12, 1945 20 l 54 22 53 l/l/l/III I; I 29 m 44 !49 I V i a mu 1 i; 5 I a I 1 41 4 Sheets-Sheet 1 INVEN TOR fidiwflrmzakgger ATTORNEY Oct. 29, 1946. J, BRENZINGER 2,410,263

' CAN ENDVSEAMING MECHANISM Filed 0012. 12, 1945 4 Sheets-Sheet 2 .LNVENTOR .lh/ius Erma/rye? BY ATTOR NEY Oct. 29, 1946. Q BRENZINGER- 2,410,263

CAN END SEAMING MECHANISM Filed Oct. 12, 1945 4 Sheets-Sheet 3 I 1. 46 i I H I Pg & G if I E "z 7' |NVENTOR' 60 Julius firertzbyer HTTORNEY 1946- J. BRENZINGER 2,410,263

I CAN END SEAMING MECHANISM Filed Oct. 12, 1945 4 Sheets-Sheet 4 g I WINHW INVENTOR Julius firznzzrggzr ATTORNEY Patented Oct. 29, 1946 CAN END SEAMING MECHANISM Julius Brenzinger, Fairfield, Conn, assignor to The Max Ams Machine Company, Bridgeport, Conn, a corporation of New York Application October 12, 1945, Serial No. 621,930

1 Claim.

The present invention relates to seamingmechanisms, and has more particularly reference to that type of seaming-mechanism disclosed in U. S. Letters Patents Nos. 1,167,346, 1,167,347 and 1,351,831 in which a seamer-head is mounted to have a bodily shifting movement to sequentially carry a plurality of seaming-rollers on the seamer-head into and out of seaming position with respect to the work-piece to be acted upon. That is to say: instead, as in usually the case, of moving each seaming-roller, one after the other, with respect to the seamer-head and the work-piece, the seamer-hand is bodily moved to effect the in-an'cl-out movement of said seaming-rollers with respect to the work-piece.

The main object and feature of the invention is to provide a seamingmechanism especially adapated for use in homes and in municipal or neighborhood canning-centers; that is to say: a simple mechanism not requiring a skillful operator and one in which the seaming-cycle can be interrupted for the purpose of adjustment or otherwise Without destroying the sequence of operation of the parts.

In the accompanying drawings the invention is disclosed in a concrete and now preferred form, in which:

Fig. 1 is a front view in elevation of a device embodying the invention;

Fig. 2 is a vertical sectional View of the parts of the upper portion shown in Fig. 1, the section being taken substantially on the plane of irregular line 2-2 of Fig.

Fig. 3 is a horizontal sectional view substantially on the plane of line 33 of Fig. 2;

Fig. i is a horizontal sectional view substantial- 1y like Fig. 3, but on a slightly larger scale and showing the parts in a different position;

Fig. 5 is a horizontal sectional view substantially on the plane of line 55 of Fig. 2; and

Fig. 6 is a vertical sectional view substantially.

on the plane of line 56 of Fig. 3.

20 is a rotatable shaft suitably mounted in framework 2| of the device. This shaft can conveniently be operated by means of a bevel-gear 22, mounted fast on said shaft at its upper end, which bevel-gear 22 is driven from a bevel-pinion 23 that can be operated by a small motor or by handle 24. Said shaft 20 is provided at its lower end with means to engage a work-piece, such means here being a chuck 25. 26 indicates a rotatable pedestal to support a work-piece or can and cover indicated at 21, and said pedestal 26 is provided with means 28 to raise and lower the pedestal to bring the work-piece into and out of engagement with chuck 25.

29 indicates a horizontally extending supporting-plate on the framework, on the underside of which plate is located a. bodily shiftable seamer-head 39, which latter is provided with a forked extension 31 and two elongated slots 32. Seamer-head 34] is kept in frictional engagement with said plate 29 by means of screws 33, carried by the seamer-head, which extend upwardly through elongated slots 32. Washers 34 on the upper side of plate 29 afford a support for springs 35 surrounding said screws 33 and are kept under appropriate tension by means of wing nuts 36. Forked extension 3| is in engagement with a pivot 31 on plate 29. Mounted On fixed centers of rotation of said scanner-head are a plurality of seaming-rollers, here two, 38 indicating the first-operation seaming-roller, and 39 indicating the second-operation seaming-roller. Mounted loosely on rotatable shaft 20 is a sleeve 49, at the lower end of which is fixed an eccentric bushing 4| that engages an opening d2 in seamer-head 30. It will be seen that a turning movement of sleeve 40, and thereby of eccentric bushing 4|, will shift seamer-head 30 bodily in frictional engagement with the underside of plate 29, and that said seamer-head will both turn and slide on pivot 31 by reason of the engagement of forked extension 3! with said pivot 37, to thereby bring seamingrollers 38 and 39 sequentially into and out of engagement with the work-piece, that is: to seam a cover to a can.

The principle of the above-described movement is disclosed in the aforementioned patents, and the instant invention has more particularly to do with novel means for turning and controlling sleeve 4E! and eccentric bushing M. The means, to be disclosed, turn sleeve 40 and eccentric bushing ll intermittently, during a cycle of operations, and not, as heretofore, continuously during such cycle.

As above mentioned, shaft 20 is rotatable and has affixed thereto a bevel-gear 22. Shaft 20 is, in this instance, rotated by gear 22, and this gear can conveniently be used as a carryingmember for certain instrumentalities as will presently appear, and said gear 22 will hereinafter be referred to as a carrying-member.

Mounted to turn with loose sleeve 48, are two ratchets, one a feedingratchet 43 and the other a stop-ratchet 44. As it is desired, here, to impart eight steps to sleeve 4% and eccentric bushing 41 to effect one revolution thereof, feedingratchet 43 is provided with eight teeth as shown.

Similarly, as it is desired to index sleeve 40 at the end of each of its intermittent steps, stopratchet 44 is likewise provided with eight teeth as shown. And as it is desired to terminate the cycle of movements of the mechanism at the end of one complete revolution of sleeve 40, stopratchet 44 is provided with one tooth 45 of greater depth than that of the other seven teeth formed therein.

Mounted to rotate with carrying-member 22 is a feeding-dog 45 to engage, when in its operative position, feeding-ratchet 43 to advance sleeve 40 intermittently step by step. Feeding-dog 45 is pivotally supported at its central point 4'! and is urged by spring 48 into its operative position. Feeding-dog 4 also carries a cam-roll .9 to engage stationary circular cam 5t to keep feeding-dog 46 in its inoperative position out of engagement with feeding-ratchet 43. Cam 50 is provided with a gap 5i and with a manually movable wall-section 52 to close or expose said gap, said gap 5! when exposed releasing feedingdog 46 to engage feeding-ratchet 43 by reason of the pull of spring 43. Wall-section 52 is, here, mounted on a lever 53 pivotally supported at 54 on the framework. A Spring 55 urge wallsecticn 52 into position to close gap 5!. It will be seen that, so long as wall-section 52 keeps gap 5i closed, feeding-dog 45 will rotate with carrying-member 22 without engaging feedingratchet 43 and without turning sleeve AD, but that, when wall-section 52 has been moved to expose gap 5!, feeding-dog 46, as it rotates with carrying-member 22, will engage feeding-ratchet 43 once to each revolution of said carrying-member to turn sleeve 40 one step.

55 indicates an indexing-pawl pivotally supported at 51 on the framework and urged into engagement with stop-ratchet 44 by means of spring 58. Whenever a tooth on stop-ratchet 44 comes opposite indexing-pawl 55, said indexing-pawl will engage said tooth to stop and index stop-ratchet 44 and sleeve 40, and the parts are so timed that this occurs at the end of each step imparted to feeding-ratchet 43 by feedingdog 4-5. 59 indicates a trip-cam mounted on, and to rotate with, carrying-member 22. The function of this trip-cam 59 is to engage cam-surface 55 of indexing-pawl 55, once to each revolution of carrying-member 22, to move indexing-pawl 55 out of engagement with a tooth on stop-ratchet 44, and this occurs at the time that cam-roll 49 reaches gap 5! and feeding-dog 46 engages feeding-ratchet 43.

It has previously been shown that stop-ratchet 44 has one deep tooth 45. (ii indicates a manua- 1y releasable latch-pawl, to engage deep tooth 45 of stop-ratchet 44, here conveniently mounted on pivot 54 and connected to lever 53 that carries Wall-section 52. So long as latch-pawl 5| is in engagement with tooth 45 of stop-ratchet 44, and wall-section 52 closes gap 5| of cam 50, rotation of shaft 25 and carrying-member 22 will have no effect on the seaming-mechanism except to rotate chuck 25}. However, when latch-pawl 6! is disengaged from tooth 45, and wall-section 52 is lifted to expose gap 58, then, when shaft 25 and carrying-member 22 are rotated, feeding-dog 45 will engage feeding-ratchet 43 once to each revolution of carrying-member 22 and will turn sleeve 45 step by step until said sleeve 45 has made a complete revolution, when latchpawl 55 will again engage tooth 45 to thereby stop rotation of said sleeve 40, and wall-section 52 will close gap 5| of cam 50 o that further rotation of shaft 20 and carrying-member 22 will not turn sleeve 40.

In using the device, the operator places a work-piece 21 on pedestal 26, and elevates said pedestal to cause the work-piece to engage chuck 25. The parts being in the position shown in Fig. 3, the operator lifts latch-pawl BI and wallsection 52 and begins to turn handle 24. The turning of handle 24 will eventually bring deep tooth 45 back to latch-pawl 6|, thereby completing the seaming-cycle. The operator now lowers pedestal 25 and removes the container. It will be seen that the seaming operation can be interrupted for the purpose of inspection or adjustment, and then resumed without destroying the sequence of the steps of the seaming-cycle. Similarly, if the operator continues to turn handle 24 after the completion of the seaming cycle, nothing will happen to destroy the sequence of the steps of the next seaming-cycle.

I claim:

In a seaming-mechanism having a rotatable shaft provided with means to engage and rotate the work-piece to be acted upon, and having a seamer-head provided with a plurality of seaming rollers, said seamer-head mounted to have a bodily shifting movement to sequentially bring the seaming-rollers thereof into and out of seaming position with respect to said Work-piece, and in which seaming-mechanis1n said bodily shifting movement of said seamer-head is efiected by means of an eccentric bushing fiXed to a sleeve that is mounted loosely on said shaft: the combination with said rotatable shaft and with said sleeve that is mounted loosely thereon, of a feeding-ratchet and a stop-ratchet, both mounted on, and to turn with, said sleeve, said feeding-ratchet constructed and arranged to be engaged intermittently by a feeding-dog, when the latter occu-v pies its operative position, to turn said feedingratchet, and thereby said sleeve, one step constitutes a part of a revolution, and said stopratchet constructed and arranged to be engaged at the end of each step of said sleeve by an indeXing-pawl, and to be engaged once to each revolution of said sleeve by a latch-pawl; a carrying-member, mounted on and rotatable with said shaft, constructed and arranged to support a pivotally mounted feeding-dog to engage said feeding-ratchet intermittently when the feeding-dog occupiesits operative position, and to support a trip-cam to engage said indexing-pawl intermittently; a feeding-dog, pivotally mounted on said carrying-member, having means tending to urge it into operative position to engage said feeding-ratchet, and provided with a cam-roll to engage a stationary circular cam to keep said feeding-dog in an inoperative position to prevent it from engaging said feeding-ratchet; a stationary circular cam to be engaged by the cam-roll carried by said feeding-dog that is mounted on said carrying-member to keep said feeding-dog in an inoperative position to prevent it from engagement with said feeding-ratchet, said circular cam having a gap and a manually movable wall-section to close or expose said gap, said gap when exposed releasing said feeding-dog and rendering it operative to engage said feedingratchet to advance said sleeve one step once to each revolution of said carrying-member; an indexing-pawl constructed and arranged to engage said stop-ratchet at the end of each step of said sleeve, and to be disengaged, by a trip-cam mounted on said carrying-member, from said stop-ratchet at the time when said feeding-dog of one revolution of said sleeve after being man- 10 ually released, said stop-ratchet to latch said sleeve against motion; and connecting means between said latch-pawl and said Wall-section of said stationary cam, whereby the engagement of said latch-pawl with said stop-ratchet moves said wall-section to close the gap in said stationary cam and whereby the manual release of said latch-pawl moves said wall-section to exposethe gap in said stationary cam.

JULIUS BRENZINGER. 

